Weaving heddle



Feb. 21, 1967 B. R, KOCH 3,304,957

WEAVING HEDDLE B. R. KOCH 3,304,957

v WEAVING HEDDLE Feb. 21, 1967 Filed Nov. 23, 1964 2 Sheets-Sheet 2INVENTOR BERNHARD ROBERT KOCH United States Patent O 3,304,951 WEAVINGHEDDLE Bernhard Robert Koch, Zurich, Switzerland, assignor to Grob & Co.A.G., Horgen, Switzerland Filed Nov. 23, 1964, Ser. No. 413,171 Claimspriority, application Switzerland, Dec. 19, 1963, 15,693/ 63 11 Claims.(Cl. 139-93) The invention relates to Weaving heddles.

There are various known forms of weaving heddles which have end loopsjoined to the body of the heddle. These known weaving heddles differ onefrom another owing to the nature of the heddle body, the type of l@heend loops and the way in which such loops are connected to the heddlebody.

That part which extends between the two end loops and which includes oneor more eyes to receive warp threads, and if required, further openingsis called the body of the weaving heddle. The heddle body can be madefrom flat steel wire, strip steel or of tinned twin wire, as used fortwin wire heddles. The end loops which are to lbe mounted on the body ofthe heddle are of a shape determined by the shape and dimensions of theheddle carrying rods. They can either embrace the heddle carrying rodscompletely, be open at one `side (C- or lshaped) or be hookorclaw-shaped.

Heddles are known with attached one-piece end loops, so-called end loopplates, as well as such with two end loop plates which are individuallyattached to the end of the Iheddle body, vand such with double end looppart formed by folding.

One-part end loop plates are joined to the heddle body in the knownmanner by inserting its end into ya suited slot-like opening at one endof the plate and soldering or welding it onto same. If the heddle bodyconsists of tinned twin wire, its end may be split and the individualwires bent apart and pressed into suitable openings. In this kind ofheddle it is desirable that the weaving heddles, once the end loopplates have been attached, can be transported to the soldering devicewithout changing their position in relation to the heddle body.

To attach a flat steel heddle body to a one-piece end loop plate the endof the body may in the known manner be punched head-shaped and fittedinto a suitable cut-out and soldered. A more simple method is. to weldthe broad side of a one-piece ilat end loop plate to the broad side ofthe heddle body. This joint however has distinct protruding edges andwarp threads may get caught.

It has been suggested that two closely adjacent end loop plates or twoindividual end loop plates be attached to the heddle body. This requiresa welding operation and at the junction the thickening is more distinct,thereby unfavourably inuencing the maximum set of heddles.

It has also been proposed to attach one-piece end loop plates to flatsteel heddles by different ways of interlacing the end of the heddlebody with the end loop plate.

Such connections can be carried out without welding or soldering,however, the one piece end loop where it is folded is about two or threetimes its thickness and considerably reduces the number of heddles thatcan be lined up and warp threads can get caught at the variousprotrudings. To introduce or hook the end of the heddle Patented Feb.21, 1967 ICC body into the end loop plate and the subsequent bendingoperation are an obstacle to quick Iand economic manufacture.

It is the purpose of the invention to create a weaving heddle with atleast one separately manufactured onepiece end loop, which is connectedto the heddle body without welding, soldering -or bending, byintroducing the end of the heddle body into the end loop, which whenpressing the latter enters into openings provided therein.

Thus, according to the present invention, a weaving heddle including atleast one end loop and a heddle body secured thereto, said end loophaving superimposed parts between which the heddle body extends ischaracterised in that the end of the heddle body is held in position inthe loop by at least one deviation which is achieved by entering thebody into a correspondingly adjusted cutout in the material of the endloop.

A suited procedure to manufacture this new heddle is that the end of theheddle body is slid into the sleeve shaped end loop and is thendistorted by pressing same together.

The invention will now be described further, by way of example only,with reference to the accompanying drawings in which:

FIG. 1 shows a lateral view of a twin wire heddle with attached endloops;

FIG. 2 shows the upper end loop of FIG. l to a larger scale;

FIG. 3 is a cross-section on the line III-III of FIG. 2 to a largerscale;

FIG. 4 is a longitudinal section on the line lV-IV of FIG. 2 to a largerscale;

FIG. 5 shows an alternate form of upper end loop;

FIG. 6 is a cross-section on the line VI-VI of FIG. 5 to a larger scale;and

FIG. 7 shows a longitudinal section on the line VII- VII of FIG. 5 to alarger scale;

FIG. 8 is a plan view of a yblank employed in forming the end loop; .and

FIG. 9 is a perspective view of the prefolded blank 4before being foldedside to side and after the heddle end has been inserted.

The weaving heddle as illustrated in FIG. 1 consists of the heddle body`1 with a uniform, laterally open, C- shaped end loop 2 secured to eachend thereof. In the embodiment illustrated, the body 1 of the weavingheddle corresponds with that of a twin wire heddle with twin wiresarranged juxtapositioned in the running direction of the warp. The eyeto accommodate the warp thread has been omitted for simplicitys sake.The heddle illustrated shows the end loops 2 at the upper and lower endsof the body, but it is to be appreciated that it would be possible toprovide an end loop at one end only.

FIG. 2 shows an upper end loop 2 made of strip steel folded side to sideso that the abutment joint 3 does not coincide with one of the twoedges. At 4a and 4b longitudinal recesses have been provided at thejoint side, into which recesses the twin wire of the heddle body enters.

The cross-section of the end loop 2, as illustrated in FIG. 3, shows howthe twin wire of the heddle body 1 enters into the recess 4a. Thisillustration clearly showsthat thanks to the recess 4a the twin wire ofthe Weaving heddle causes no thickening whatsoever of the end loop 2.Such end loops lie at on each other `and can be perfectly piled contraryto known -one-piece end loops, since the thickening that would have beencaused by soldering7 can be avoided.

The longitudinal section as shown in F'IG. 4 demonstrates how the end ofthe heddle body 1, after the introducing thereinto and the pressingtogether of the prefolded end loop 2 successively enters into theopenings b, 4b, 5a and 4a provided alternately in the back and `front orinner or outer walls of the end loop, the openings being arranged inpartly 4overlapping relationship in said inner and `outer walls. Withoutsoldering or welding a connection is cre-ated which is not 4subject toplay, and is resistant to pull simply by bending and respectivelyoffsetting successive portions of the end of the heddle body. Also, inthe longitudinal direction of the end loop, no thickening is caused byintroducing the heddle body end.

A `further important advantage -of this weaving heddle is that it issufficient to place the cut-off end of the heddle body into thepre-folded end loop as shown in FIGURE 9 and then completing the foldfrom side to side as shown in FIGURE 3. Any splitting of the twin wireand bendin-g or spreading of the individual wires is not necessary.Likewise, one has only to cut off the heddle body o-f flat steel heddleswhen assembling same. Any fitting form and respective cut-out in the endloop can be saved.

Since the ends of the twin wire forming7 the heddle body of the twinwire heddle no longer have to be spread this connection can be keptconsiderably narrower than with the known arrangements. As shown in FIG.2, the upper part of the connection of a heddle for a riderless weavingframe with C-shaped end loops can by virtue of its small width, alsoextend to a position adjacent to the cut out for taking up the heddlecarrying rod. Thus, it is possible to keep the end loop shorter, bywhich a saving of raw material, lessening of weight :and correspondinglyeasier movement of the weaving heddle is achieved.

It is no longer necessary to slit the end loop over the full extent ofthat part of the heddle body which enters the loop and thus theweakening of the body is less.

By virtue of its small width the junction can also be placed near thenarrow ed-ge of the end loops formed by a welt. The advantages of thisarrangement are described with reference to FIGS. 5 to 7, such iiguresshowing the upper part of a weaving heddle with closed end loop. The endloop 6, into which the end of the heddle body 7 is pressed, alsoconsists of one part and has an abutment joint 8. For example, two inthis case round, cut-outs 9a and 9b have been provided, with which thetwin wire of the heddle body 7 is engaged. The long cut-out 11 serves toaccommodate the heddle carrying rod. `In order to reduce weight, oblongslots |12 have been provided. The slots are loc-ated either on thefr-ontor joint-side, as can be seen from FIG. 6, or if they are on thefrontand rear-side they are staggered relative to each other. Thus it ispossi-ble to avoid accumulation of fluff and fly, since the slots arenot going lright through and their depth is limited.

Lf the cut-outs in the end loop are staggered and do not even partlycoincide, as shown in FIGS. 6 and 7 and if the end loop is made ofmaterial well suited 4for cold working, the twin wire 7 and the end loopmaterial, in areas where no cut-outs are provided, are squeezed when theend loop is closed and pressed flat. At the spot where the heddle body 7enters into the end loop 6 it is feasible somewhat to chamfer the endloop at 13 to cre-ate la conical inlet.

The heddle body 7 lies at one side of the vertical axis running throughthe cut-out 11 for the upper and lower heddle carrying rod. By reversingalternate heddles having closed end loops on the heddle carrying rods adouble rowed heddle set-up can be achieved without the heddle having tobe bent twice in the known manner near the .upper and lower end loops.

It is in the intention 'of the invention that the end loop can becreated differently and the positioning, shape and number of thecut-outs be varied. If the material from which the end loops are .madecan be cold-worked, the cutouts can be arranged unstaggered. The bodyof. the weaving heddle will enter int-o the cut-outs on either side orbe squeezed between the end loop material.

It is also possible to choose the cut-outs so that only one of the twinwires enters whilst the other enters for example into the oppositecut-out staggered by the thickness of the individual wire.

What I claim is:

1. A weaving heddle including at least one end loop and a heddle bodysecured thereto, said end' loop having superimposed parts forming innerand outer walls between which the heddle body extends, one end of saidheddle body being held in position by said parts against `frictionaldisplacement, `said inner yand outer walls being provided with at least-one cut-out and said heddle -body lbeing provided with a laterallyextending offset portion extending into said cut-out to securely holdsaid heddle body end between said superimposed parts.

2. Weaving heddle as claimed in claim 1 characterised in that the endloop consists of a folded piece of plate with its ends forming a joint,said joint being positioned in one wall of the end loop.

3. Weaving heddle as claimed in claim 2 characterised in that thecut-outs are openings in the plate which forms the end loop.

4. Weaving heddle as claimed in claim 3 characterised in that theopenings in the inner and outer walls of the end loop are staggered withrelation to each other in the longitudinal direction of the end loop.

5. A weaving heddle comprising lspaced end loops and a heddle bodyextending between said loops and the ends of said heddle body secured tothe said end loops, each end loop having two superimposed parts betweenwhich the respective end of. the heddle 4body is located and which,furthermore, present openings into which the heddle body extends thus topreclude longitudinal motion of the body relative to the loop.

6. A weaving heddle as claimed in claim 5 wherein the openings in onepart are disposed in part overlapping relationship relative to those ofthe other part.

7. A weaving heddle as claimed in claim 6 wherein the end loop consistsof a folded piece of plate having the edges terminating in a joint and aside face area, the joint being positioned in the area of one .side faceof the end loop.

l8. A weaving heddle comprising an end loop formed 4from a folded plate,ya heddle body extending between superimposed parts of the end loop, anddetent formations in adjacent opposed walls of. the end loop into whichthe heddle body extends thus to preclude longitudinal movement thereofrelative to the end loop, the detent formations of one wall beingdisplaced in the longitudinal direction of the heddle body relative tothose of the other wall.

9. A weaving heddle as claimed in claim 8 wherein the plate which formsthe end loops is folded side by side so that the edges thereof abut andforms a joint which lies in the area of one wall of the end loop.

.10. 'In the method of making a heddle having a heddle body and an endloop, the steps of locating the end of said heddle body betweensuperimposed parts of an end loop, each such superimposed part havingdetent formations in align-ment with the heddle body and across whichthe sai-d body extends, and applying pressure to the superimposed partsthus to deform the body and to cause said body to move into the .detents11. In a heddle structure, comprising an elongated heddle body havingalternate offset bent portions, and a heddle loop attached and clampedto the end of the heddle body, said heddle loop having wall portionsextending on opposite sides of said heddle body and said wall portionsbeing provided with offset and staggered openings for receiving saidalternate offset bent portions o-f the heddle body.

UNITED References Cited by the Examiner STATES PATENTS 6 2,646,8257/1953 Thorpe 139-96 2,691,389 10/1954 Thorpe 139-96 2,964,066 12/1960Ramseier 139-95 FOREIGN PATENTS 372,255 11/ 1963 Switzerland.

M'ERVIN STEIN, Primary Examiner.

I. KEECHI, Assistant Examiner.

1. A WEAVING HEDDLE INCLUDING AT LEAST ONE END LOOP AND A HEADDLE BODYSECURED THERETO, SAID END LOOP HAVING SUPERIMPOSED PARTS FORMING INNERAND OUTER WALLS BETWEEN WHICH THE HEDDLE BODY EXTENDS, ONE END OF SAIDHEDDLE BODY BEING HELD IN POSITION BY SAID PARTS AGAINST FRICTIONALDISPLACEMENT, SAID INNER AND OUTER WALLS BEING PROVIDED WITH AT LEASTONE CUT-OUT AND SAID HEDDLE BODY BEING PROVIDED WITH A LATERALLYEXTENDING OFFSET PORTION EXTENDING INTO SAID CUT-OUT TO SECURELY HOLDSAID HEDDLE BODY END BETWEEN SAID SUPERIMPOSED PARTS.